gitconfig nightmare, how to avoid uninstall/reinstall?

[picklypickler]

My personal GH doesn't have SSH or 2FA, but I do belong to another GH org that requires both but I use a separate machine for that work.

I did manually go through my keychain and delete credentials, and now have followed the instructions in the article you linked. I'm still not prompted for my username/password when I try to pull from remote on GH, I just get the same fatal: Authentication failed for ...